feat: add and optimize multiple multilingual language packs

1. 新增拼团、砍价、分销、支付、地址、账户等多业务场景的中英文本地化文案
2. 替换项目中硬编码的文本为多语言调用，统一前端页面文案展示
3. 新增多个业务组件的国际化语言配置文件

lang/en-us/pay/cashier.js

@@ -0,0 +1,20 @@
+export const lang = {
+	pay: {
+		cashier: {
+			// Pay button
+			confirmPay: 'Confirm Payment',
+			// Empty states
+			noPayMethodConfigured: 'No payment method configured!',
+			orderAlreadyPaid: 'This order has been paid',
+			noPayInfo: 'Payment information not found',
+			// Payment methods
+			alipay: 'Alipay',
+			wechatpay: 'WeChat Pay',
+			// Messages
+			pleaseSelectPayMethod: 'Please select a payment method!',
+			paying: 'Processing payment...',
+			paymentCancelled: 'Payment cancelled',
+			paymentFailed: 'Payment failed, reason: {reason}',
+		}
+	}
+};